<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>页面标题</title>
    <link rel="stylesheet" type="text/css" href="css/style.css" />
    <style>
        h1{
            color: blue;
        }
    </style>
</head>
<body onload="sayHello()">
<h1>欢迎大家访问我的个人主页</h1>
<hr>
<!--
  我是注释，你看不到我.
-->
<script>
    function sayHello(){
        alert('hello,html5!');
    }

</script>

</body>
</html>